import { CanvasHorizontalAlign } from './types';
/**
 * Generate a pseudo-random number in an given interval
 */
export declare function random(min: number, max: number): number;
/**
 * Create a new canvas with a 2D context
 */
export declare function create2DContext(width: number, height: number, options?: CanvasRenderingContext2DSettings): CanvasRenderingContext2D;
/**
 * Clear the complete canvas context
 */
export declare function clearContext(context: CanvasRenderingContext2D): void;
/**
 * Change context size
 */
export declare function changeSize(context: CanvasRenderingContext2D, width: number, height: number): void;
/**
 * Round a number to given niceness
 * @example
 * ```
 * nice(0, 25) // 0
 * nice(25, 25) // 25
 * nice(27, 25) // 50
 * nice(1456, 25) // 1475
 * ```
 */
export declare function nice(value: number, niceness: number): number;
/**
 * Invert color mask, any non-transparent color is considered to be mask
 */
export declare function invertMask(context: CanvasRenderingContext2D): void;
export declare type Point2D = {
    x: number;
    y: number;
};
/**
 * Rotate a point counter-clockwise around an origin point
 */
export declare function rotatePoint(point: Point2D, origin: Point2D, angleRadians: number): Point2D;
/**
 * Convert angle in degrees to radians
 */
export declare function toRadians(value: number): number;
/**
 * Calculate top/left x and y position for a point based on text align and baseline
 * NOTE: Axis y is inverted (↓ is +)
 */
export declare function calculatePosition(x: number, y: number, width: number, height: number, textAlign: CanvasTextAlign, textBaseline: CanvasHorizontalAlign): Point2D;
export declare type BoundingBox = {
    x: number;
    y: number;
    width: number;
    height: number;
};
/**
 * Calculate bounding box based on given points
 */
export declare function getBoundingBox(...points: Point2D[]): BoundingBox;
export declare function calculateMiddlePosition(point: Point2D, width: number, height: number): Point2D;
/**
 * Calculate the actual text position based on horizontal/vertical alignment and rotation
 * When rotated, it returns the bounding box
 * NOTE: Axis y is inverted (↓ is +)
 */
export declare function getTextPosition(x: number, y: number, textSize: TextMetrics, textAlign: CanvasTextAlign, textBaseline: CanvasHorizontalAlign, angleRadians: number): BoundingBox;
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